Backrest module, seat backrest and car seat

Abstract

The application relates to a backrest module, a seat backrest and an automobile seat, and relates to the technical field of seats. The backrest module comprises a support plate and a foam body. The foam body is installed on one side of the support plate and is used for being attached to the human back. The support plate is used for providing structural support. At least one connecting part is arranged on the side of the support plate away from the foam body, and is used for fixing a movable connecting piece, so that the backrest module is detachably and movably connected to the framework or the base plate of the seat backrest. By arranging a plurality of the modules in different areas of the seat backrest, local independent support is realized. When a user leans on the seat backrest, the modules are deformed or displaced by the movable connecting piece under local force, so that the surface profile of the foam body is more attached to the curve of the human back, the pressure is dispersed, and the comfort is improved. The module structure has good universality, adjustability and man-machine adaptability, and is suitable for personalized configuration and post-maintenance replacement of multiple types of seats.

Description

Technical Field

[0001] This application relates to the field of seat technology, and more particularly to a backrest module, a seat back, and an automobile seat. Background Technology

[0002] Currently, seat backrests mainly consist of a frame, foam, and covering. The foam is installed on the frame, and the covering wraps around the entire frame and foam to form the seat backrest. However, the fit of a seat backrest to the human back mainly relies on the ergonomic design of the seat backrest and the deformation of the foam, which does not allow the seat backrest to better conform to the curves of different human bodies. Utility Model Content

[0003] This application provides a backrest module, a seat back, and a car seat, aiming to at least partially solve the above-mentioned technical problems.

[0004] To achieve the above objectives, in a first aspect, this application provides a backrest module, which is used to support a portion of a seat backrest, the backrest module comprising:

[0005] Support plate;

[0006] A foam body, wherein the foam body is mounted on one side of the support plate; wherein,

[0007] The support plate has at least one connecting portion on the side opposite to the foam body, and at least one of the connecting portions is used to fix the movable connector.

[0008] Optionally, the first connecting part is configured as a fixed rotating connecting member, and the second connecting part is configured as a fixed elastic connecting member.

[0009] Optionally, at least one of the connecting portions includes a first connecting portion and a second connecting portion, wherein the first connecting portion is configured as a fixed rotating connecting member and the second connecting portion is configured as a fixed elastic connecting member.

[0010] Optionally, the support plate includes a first support portion and a second support portion;

[0011] The first support extends along a first direction, and the second support extends along a second direction, wherein the first direction and the second direction are not parallel.

[0012] Optionally, the foam body includes a first foam portion and a second foam portion, wherein the first foam portion is correspondingly disposed on the first support portion and the second foam portion is correspondingly disposed on the second support portion.

[0013] Optionally, a groove is provided at the junction of the first foam portion and the second foam portion, and the thickness of the portion of the foam body corresponding to the groove is less than the thickness of either the first foam portion or the second foam portion.

[0014] Optionally, the groove is located on the side of the foam body opposite to the support plate.

[0015] Optionally, the length direction of the groove is parallel to the boundary line between the first foam portion and the second foam portion.

[0016] Optionally, the first connecting portion is located at the junction of the first supporting portion and the second supporting portion.

[0017] Optionally, the second connecting portion is located on the side of the first support portion facing the mounting object; or, the second connecting portion is located on the side of the second support portion facing the mounting object.

[0018] Optionally, the support plate includes multiple sub-plates;

[0019] At least two adjacent sub-plates are movably connected.

[0020] Optionally, the plurality of sub-plates include a first plate and a second plate, wherein the first plate and the second plate are movably connected.

[0021] Optionally, the first connecting portion is located on the first plate, and the second connecting portion is located on the second plate.

[0022] Optionally, the multiple sub-plates may also include a first plate, a second plate, and a third plate;

[0023] The first plate and the third plate are respectively located on both sides of the second plate;

[0024] The first plate is movably connected to the second plate, and the third plate is movably connected to the second plate.

[0025] Optionally, at least one of the first connecting portions and / or at least one of the second connecting portions are located on the first plate body;

[0026] At least one of the first connecting portions and / or at least one of the second connecting portions are located on the second plate body;

[0027] At least one of the first connecting portions and / or at least one of the second connecting portions are connected to the third plate.

[0028] Optionally, the surface of the foam body facing away from the support plate is provided with foam pores.

[0029] Optionally, the foam pores are configured to be arranged in multiples along the spine of the user's back when the user's back is in contact with the surface of the foam.

[0030] Optionally, the surface of the foam body facing away from the support plate has at least one mounting groove, which is configured to hold an air bag.

[0031] Optionally, the inner wall of the mounting groove has a plurality of protrusions and recesses in the circumferential direction, and the plurality of protrusions and recesses are connected in an alternating manner.

[0032] Secondly, this application also provides a seat back, including the backrest module described in the first aspect, and further including a base plate and a frame, wherein the base plate is disposed on the frame, and the backrest module is disposed on at least one of the base plate or the frame.

[0033] Thirdly, this application also provides an automobile seat, including a seat backrest as described in the second aspect.

[0034] In the backrest module of this application embodiment, a backrest module is formed by combining a support plate and a foam body. A connecting part is provided on the side of the support plate away from the foam body to cooperate with a movable connector, allowing the backrest module to be independently and flexibly installed in different areas of the seat back. This structural solution has several beneficial effects. First, the modular design helps reduce the complexity of the overall chair structure design and manufacturing, enabling standardized production and mass assembly, and improving manufacturing efficiency and quality consistency. Second, the cooperation between the connecting part and the movable connector gives the module a certain degree of freedom, allowing it to shift or adjust its angle according to the local pressure on the user's back during sitting, making the foam body more conform to the human body contour during use, enhancing sitting comfort and support. At the same time, the backrest module can be set with different foam shapes and performance parameters for different parts of the human body, which is conducive to achieving precise matching of ergonomic support and improving the user experience. In addition, in the later maintenance, repair, and vehicle upgrade, only the backrest module body needs to be replaced or adjusted to complete the product adaptation, significantly improving the scalability and adaptability of the seat system, demonstrating good sustainability and industrial application potential.

[0035] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] To gain a more complete understanding of this application and its beneficial effects, the following description will be provided in conjunction with the accompanying drawings, wherein the same reference numerals in the following description denote the same parts.

[0038] Figure 1 A schematic diagram of the backrest module in an embodiment of this application is shown. Figure 1 ;

[0039] Figure 2 A schematic diagram of the backrest module in an embodiment of this application is shown. Figure 2 ;

[0040] Figure 3 An exploded view of the backrest module in an embodiment of this application is shown;

[0041] Figure 4 This illustration shows a structure in which multiple backrest modules are mounted on a base plate or frame in an embodiment of this application. Figure 1 ;

[0042] Figure 5 This illustration shows a structure in which multiple backrest modules are mounted on a base plate or frame in an embodiment of this application. Figure 2 ;

[0043] Figure 6 This invention illustrates another structural diagram of the backrest module in an embodiment of this application. Figure 1 ;

[0044] Figure 7 This invention illustrates another structural diagram of the backrest module in an embodiment of this application. Figure 2 ;

[0045] Figure 8 A schematic diagram of the seat back structure in an embodiment of this application is shown;

[0046] Figure 9 An exploded schematic diagram of a portion of the seat backrest in an embodiment of this application is shown.

[0047] Explanation of reference numerals in the attached figures:

[0048] 1. Support plate; 11. First support part; 12. Second support part; 13. Sub-plate body; 131. First plate body; 132. Second plate body; 133. Third plate body;

[0049] 2. Foam body; 21. First foam section; 22. Second foam section; 23. Groove; 24. Foam pores; 25. Mounting groove; 251. Protrusion; 252. Recess;

[0050] 3. Connecting part; 31. First connecting part; 32. Second connecting part;

[0051] 4. Rotate the connecting parts;

[0052] 5. Flexible connectors;

[0053] 6. Substrate;

[0054] 7. Skeleton. Detailed Implementation

[0055] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the protection scope of this application.

[0056] This application provides a backrest module; please refer to [link / reference]. Figure 1 , Figure 2 and Figure 3 The backrest module provides partial support for the seat back and includes a support plate 1 and a foam body 2. The foam body 2 is mounted on one side of the support plate 1. The support plate 1 provides structural strength, while the foam body 2, due to its softness, primarily contacts the user's back. On the other side of the support plate 1, opposite to the foam body 2, at least one connecting part 3 is provided. This connecting part 3 engages with a movable connector, allowing the backrest module to be connected to the seat back mounting structure, such as the seat back frame 7 or the base plate 6.

[0057] It is understandable that multiple backrest modules can be arranged in different areas of the seat back, such as the left side, right side, lumbar region, and neck area. Each backrest module is an independent unit and is movably connected to the mounting structure through the connecting part 3. This allows each module to undergo relative displacement or deformation through the connecting part 3 when subjected to pressure from the human back in a localized area, thereby enabling the foam body 2 to better conform to the curves of the human body. The shape and material of the foam body 2 can be designed according to the support needs of different body parts. For example, the lumbar module can use highly resilient foam with specific protrusions to adapt to the natural curve of the lumbar spine; the neck module can be designed with a groove 23 to adapt to the physiological curvature of the cervical spine and improve the fit.

[0058] Meanwhile, the connecting part 3 of the backrest module, in conjunction with the movable connector, can employ a pivot structure, ball joint structure, or elastic limiting connection structure, allowing the module to adjust its angle or position relative to the mounting base under stress, thus providing a certain degree of freedom. This structural design facilitates automatic adjustment of each backrest module based on localized pressure when a passenger leans against it, ensuring its surface contour conforms as closely as possible to the shape of the back, reducing pressure concentration and improving seating comfort. The arrangement of the connecting part 3 can be flexibly set according to the shape of the module and its installation location; for example, it can be located at the upper edge, lower edge, or side edge of the module to adapt to the structural requirements and ergonomic parameters of different mounting base components.

[0059] Furthermore, the backrest module adopts a modular design structure, which helps reduce the design complexity and manufacturing difficulty of the product, facilitating mass production and standardized management. In the context of rapid vehicle platform updates, simply replacing the backrest module allows for quick adaptation to new models or individual user needs, without requiring a complete overhaul of the seat structure. This provides excellent versatility, expandability, and adaptability, and also facilitates maintenance and repair. Simultaneously, as a functional unit, the backrest module allows for flexible adjustment of the foam material's firmness, thickness, or shape based on the user's actual experience, contributing to ergonomic optimization of the seat.

[0060] Therefore, by combining the support plate 1 and the foam body 2 and using a movable connection structure to ensure its mobility, the backrest module constructs a backrest support system with good local adaptability. This allows the seat to improve user comfort while taking into account the modular, personalized and universal design requirements of the structure, demonstrating good technical adaptability and industrial application value.

[0061] For example, the movable connector includes a rotatable connector 4 and a resilient connector 5.

[0062] In some implementations, combined with Figure 4 , Figure 5 At least one connecting part 3 includes a first connecting part 31 and a second connecting part 32. The first connecting part 31 is configured to fix the rotating connecting member 4, and the second connecting part 32 is configured to fix the elastic connecting member 5. It can be understood that the rotating connecting member 4 can be a rotating shaft structure, a spherical hinge, a multi-directional hinge, etc., which has the ability to achieve rotational movement within a certain angle range; the elastic connecting member 5 can include an elastic rubber structure, a corrugated spring sheet structure, a flexible arm structure, a tension spring or a compression spring, etc., which is used to generate elastic displacement under the action of external force and has the ability to return to its original state.

[0063] The technical principle of this structural configuration is that when the user's back rests against the support plate 1, the support plate 1 experiences localized pressure due to contact with the human body. If this pressure is applied to the first connecting part 31, since this position is the fixed area of ​​the rotating connector 4, the support plate 1 can undergo angular displacement around the rotating connector 4, causing the support plate 1 to rotate and deform along the direction of force on the user's back, thereby forming a fit to the contour of the user's back. If the force is applied to the second connecting part 32, since the elastic connector 5 has elastic displacement capability in this area, the support plate 1 can undergo linear displacement in this area, forming a translational response of the support plate 1 relative to the installation object, so as to adjust the matching relationship between the surface contour of the backrest module and the user's back.

[0064] Based on this, the above structure is beneficial for enhancing the dynamic adaptability of the backrest module while maintaining structural simplicity. The support plate 1 provides differentiated feedback to the force response in different directions through two different types of connection structures, enabling the backrest module to not only have bending and deformation capabilities but also displacement adjustment capabilities. This not only meets the needs of multi-angle fit but also improves the overall structural response flexibility. In terms of arrangement, the first connecting part 31 and the second connecting part 32 can be respectively set on the opposite side, upper and lower parts, or one in front and one behind of the support plate 1 in different positions to adapt to the different characteristics of the human back curve and pressure distribution.

[0065] It should be noted that "fixed rotating connector 4" refers to the first connecting part 31 being fixed to the rotating connector 4, allowing the first connecting part 31 to rotate relative to another connected object (such as the frame 7 or the base plate 6); "fixed elastic connector 5" refers to the second connecting part 32 being fixed to the elastic connector 5, but the elastic connector 5 itself can generate elastic displacement in the structural direction. The distinction between "rotation" and "offset" is important here, that is, the former is the rotational behavior about the central axis of the rotating connector 4, while the latter is the linear displacement behavior of the elastic connector 5 itself. The combination of the two constitutes the composite structural response capability of the support plate 1.

[0066] Through the above structural configuration, different types of connectors are introduced into the backrest module design for different connection methods of the connecting parts 3, so that the backrest module can rotate or shift according to the force state in different directions during the user's sitting process, forming a more three-dimensional and zoned responsive structural characteristic, improving the backrest module's ability to conform to the human body curve, and helping to improve comfort and support balance under long-term sitting conditions.

[0067] In some implementations, combined with Figure 4 , Figure 5The support plate 1 includes a first support portion 11 and a second support portion 12. The first support portion 11 extends along a first direction, and the second support portion 12 extends along a second direction. The first and second directions are not parallel; for example, they can be arranged at a certain angle to form a V-shaped cross-sectional profile. This V-shaped structure causes the support plate 1 to taper in the thickness direction, and the first support portion 11 and the second support portion 12 form a relatively concave joint area at their junction. This joint area is provided with a movable connection structure for connecting the base plate 6 or the frame 7 of the seat back. This connection at this location helps to create a good rotational response space when the user sits on the seat.

[0068] It is understandable that when the user's back contacts the backrest module, the pressure applied to the support plate 1 is distributed to the first support part 11 and the second support part 12 through different areas of the user's back. Because the first support part 11 and the second support part 12 are distributed in different directions, the support plate 1, after being subjected to force, will exhibit a concentrated deformation tendency in the direction of the resultant force at the junction area. This area is precisely where the movable connector is located, and the movable connector allows this junction area to rotate around a rotation axis. Therefore, under pressure, the support plate 1 can deflect at the bottom junction of the V-shaped structure, thereby guiding the entire support plate 1 to appropriately shift or rotate along the back pressure direction, forming a contact interface that more closely conforms to the contour of the user's back.

[0069] It is worth noting that the angle between the first direction and the second direction is not fixed. It can be designed differently according to the installation position and function of different backrest modules. For example, the angle of the support part of the backrest module arranged on the left and right can be set to converge towards the center. When the user lies down, the left and right support plates 1 can generate a synchronous deflection trend through the V-shaped structure, forming a wrap-around shape to fit the two sides of the human back, thereby improving the cooperative fit between the left and right support plates 1.

[0070] In the structural explanation, "first support part 11" and "second support part 12" refer to two parts on the support plate 1 that extend in different directions and respectively constitute the main deformation and load-bearing surfaces of the pad body, and are not limited to specific materials or connection methods; "non-parallel" means that there is an angle relationship between the two directions, which can be an acute angle, a right angle, or an obtuse angle structure to form a three-dimensional cross section. "Intersection" is the structural center of the intersection of the first support part 11 and the second support part 12, and can be designed as an arc surface, a wedge shape, a concave surface, or a smooth transition surface.

[0071] Through the above structural configuration, the support plate 1 features a V-shaped structure, with the bottom of the V-shape serving as the core of the movable connection. This provides rotational space during localized deformation under stress, which is beneficial for adapting to complex curvature changes in the user's back. It also enhances the dynamic coordination between the two support plates 1, thereby improving the overall ergonomic adaptability and seating comfort of the backrest system. This design also gives the backrest module high modular adaptability and flexibility, facilitating localized adjustments and optimized combinations on different seating platforms.

[0072] In some implementations, combined with Figure 2 , Figure 3 and Figure 4 The foam body 2 is composed of a first foam portion 21 and a second foam portion 22. The first foam portion 21 is mounted on the first support portion 11, and the second foam portion 22 is mounted on the second support portion 12. The first support portion 11 extends along a first direction, and the second support portion 12 extends along a second direction. The first and second directions are not parallel; for example, they can be arranged at an angle or in a bent structure. This structural design provides better matching and structural fit between the foam body 2 and the support plate 1, which is beneficial for improving the overall molding consistency and bonding stability of the module.

[0073] It is understandable that, in terms of specific installation methods, the first foam part 21 and the second foam part 22 can be fixedly connected to their respective support parts by means of adhesive bonding, snap-fitting, heat fusion, or mechanical fastening. Simultaneously, the foam body 2 can be divided into multiple sub-components, allowing for the creation of foam units of different thicknesses, densities, or shapes based on the curvature or stress characteristics of different support areas. For example, the first foam part 21 can use a softer material to adapt to the shoulder contour, while the second foam part 22 can employ a harder structure to enhance lumbar support performance. This structural partitioning design improves the adaptability of the foam body 2 to the complex curvature of the human back and helps control the deformation stability of the foam body 2 after repeated pressure, giving the backrest module a strong local load-bearing adjustment capability. In the modular layout of the seat back, this split foam body 2 can more precisely match the ergonomic needs of each support area, strengthening the support partitioning function of the backrest module, while improving the consistency and controllability of foam body 2 assembly during the production stage, meeting the dual application scenarios of mass production and customized layout.

[0074] In some implementations, combined with Figure 2 , Figure 4The foam body 2 includes a first foam portion 21 and a second foam portion 22, which are arranged adjacently to fit different areas of the human back, such as the shoulder and waist, or the upper and lower back. A groove 23 is provided at the junction of the first foam portion 21 and the second foam portion 22. This groove 23 is formed within the structure of the foam body 2, such that the thickness of the foam area corresponding to the groove 23 is less than the thickness of either the first foam portion 21 or the second foam portion 22. Furthermore, the groove 23 can be U-shaped, V-shaped, or other recessed shapes that can create a locally thinned structure; the specific structure can be flexibly designed according to the application scenario.

[0075] It is understandable that the above structural design gives foam 2 a strong ability to adapt to deformation during use. Because the seat back is subjected to periodic pressure from the user's body during long-term use, especially during changes in reclining posture, foam 2 often bends at the junction of the first foam part 21 and the second foam part 22. If the thickness in this area is uniform and relatively large, permanent wrinkles may appear during repeated stress and bending, even affecting the overall fit and lifespan of foam 2. By setting a thinned groove 23 at the junction, foam 2 gains localized flexibility in this area. Bending deformation is concentrated in the groove 23 area, which can absorb bending stress to a certain extent and limit its expansion to the foam parts on both sides. This helps reduce structural fatigue caused by repeated compression and stretching of foam 2 in this area.

[0076] Furthermore, the groove 23 structure is highly controllable, allowing for integral molding during the foam body 2 molding process without the need for additional connections or assembly processes. This facilitates standardized manufacturing and quality control during the processing stage. In actual use, even if wrinkles occur in the area of ​​the junction groove 23, they are concentrated in the thinner recessed areas, having a limited impact on the user's back support curve. This maintains the overall fit and stability of the first foam part 21 and the second foam part 22, helping to extend the functional lifespan of the backrest module and improve seating comfort.

[0077] In summary, this structural design, by locally thinning to form a flexible groove 23, enables the foam body 2 to have good deformation adaptability and durability stability. Structurally, it is easy to process in one piece, and functionally, it helps to disperse the structural stress at the interface, improve the fit and comfort of the backrest module, and meet the engineering needs of long-term high-frequency use scenarios.

[0078] In some implementations, such as Figure 2 , Figure 4As shown, the groove 23 is located on the side of the foam body 2 away from the support plate 1, that is, on the side of the foam body 2 that directly contacts the user's back. The groove 23 forms an inward recessed structure, so that this area is slightly lower than the conventional surface of the foam parts on both sides. With this arrangement, when the user's back is against the foam, a relatively independent isolation cavity is formed in the groove 23.

[0079] It is understandable that when a user's back applies pressure to the backrest module, the foam 2 tends to bend to some extent, especially at the junction of the first foam part 21 and the second foam part 22, where local deformation is more likely to occur. By placing the groove 23 on the side that the user is in contact with and designing it as a thinner structure, when bending occurs, the foam 2 is more likely to develop controlled wrinkles in the groove 23 area. Because these wrinkles are located in the recessed groove 23 within the foam 2, the direction of wrinkle expansion can be controlled to a certain extent, and the wrinkle space can be constrained, essentially limiting it to the internal space of the groove 23. This not only reduces the direct impact of wrinkles on the user's back contact surface but also provides a buffering and adjustment effect on the shape of the foam 2 during long-term use, reducing discomfort.

[0080] Furthermore, placing the groove 23 on the user-facing side of the foam 2 avoids structural weaknesses at the interface between the foam 2 and the support plate 1, thus contributing to the structural stability of the bonded or fixed connection between the foam 2 and the support plate 1. By forming a controllable recessed structure on the outer surface of the foam 2, combined with a thickness variation arrangement, the design enhances the structural adaptability and material fatigue adjustment capabilities of the foam 2 during long-term repeated use, while also ensuring user comfort. This design helps maintain high fit and deformation tolerance under different shapes and usage intensities, exhibiting strong application adaptability and processing feasibility.

[0081] In some examples, combined Figure 1 The length of the groove 23 is parallel to the boundary line between the first foam part 21 and the second foam part 22, meaning that the extension direction of the groove 23 is basically consistent with the longitudinal direction of the user's spine. Since the direction in which the user's back is longitudinally pressed against the backrest module is usually consistent with the direction of the spine when using the seat back, the arrangement of extending the groove 23 along the boundary line is beneficial to guiding the foam body 2 to deform in the direction of the user's spine when subjected to bending force, which helps to improve the flexibility and conformity of the foam structure in this area.

[0082] It is understandable that when a user lies back on the backrest module, the back exerts an inward compressive force on the foam 2, especially at the junction of the first foam section 21 and the second foam section 22, where local stress concentration occurs due to the structural transition. By placing the groove 23 at this junction and extending it parallel to the junction line, the foam 2 can be guided to produce a uniform wrinkling deformation path to a certain extent, making the local deformation regular and concentrated within the space of the groove 23. This reduces the local tensile or compressive strength in other areas of the foam 2 and slows down the fatigue process of the foam material.

[0083] Furthermore, the longitudinal arrangement of the grooves 23 is more suitable for the natural extension trend of the spine's curve, making it easier to conform to the longitudinal contour of the human back during bending and deformation, thus enhancing the module's ability to coordinate with the local shape of the human body. The grooves 23 guide the flexible adjustment of the foam body 2 in the length direction, allowing it to adapt to the dynamic curvature changes of different users' spines in sitting or lying positions, which is significant for improving the backrest module's fit and comfort. In summary, the longitudinal arrangement of the grooves 23 plays a significant role in improving the pressure resistance and adaptability of the foam body 2 to changes in human body shape.

[0084] In some implementations, such as Figure 4 , Figure 5 As shown, the first connecting part 31 is disposed on the first support part 11, specifically at the junction of the first support part 11 and the second support part 12. The first connecting part 31 is configured as a fixed rotating connector 4, used to form a rotating connection with the corresponding connecting object on the seat structure. In this structure, the first support part 11 and the second support part 12 of the support plate 1 form a specific angle, making their junction a region of concentrated force. This junction, as a rotating connection position, facilitates the deflection of the entire support plate 1 around the rotating connector 4. Since the first connecting part 31 is disposed at the junction, it can guide the main support structure of the cushion to form a deflection trajectory around this point when the cushion is subjected to force, thereby adjusting the angle of the cushion surface to conform to the user's back in different postures. This configuration improves the adaptability of the support plate 1 to complex back curves during use and facilitates the coordinated fit between multiple modules through corresponding rotation angles, enhancing the support and comfort of different areas of the back. Meanwhile, the "junction area" refers to the naturally formed connection and transition area between the first support part 11 and the second support part 12 in terms of structure. It can be a right-angle turn or a curved surface connection, and is not limited to a specific geometric shape. The "fixed rotating connector 4" refers to a structural connection method that can provide rotational freedom, such as a pivot, hinge, or rotatable joint, with the aim of providing room for movement in a certain angular direction while maintaining a reliable connection. This embodiment achieves local shape adjustment function through structural arrangement, which is beneficial for the backrest module to adapt to the usage needs of different users.

[0085] In some implementations, combined with Figure 4 , Figure 5 The second connecting portion 32 is configured as a fixed elastic connector 5 for connecting the support plate 1 to the mounting object. The second connecting portion 32 is located on the side of the first support portion 11 facing the mounting object, or on the side of the second support portion 12 facing the mounting object. Further, the mounting object refers to the base plate 6 or frame 7 of the seat back.

[0086] It is understood that the first connecting part 31 is located at the junction of the first support part 11 and the second support part 12, and is connected to the rotating connector 4, which provides the support plate 1 with the freedom to adjust its angle. The elastic connector 5 connected to the second connecting part 32 provides deformation recovery capability, so that the support plate 1 can return to its initial state after the external force is removed after being deformed by pressure.

[0087] Based on this, during use, when a user's back rests against the support plate 1, the support plate 1 will deflect at the rotation point defined by the first connecting part 31. Simultaneously, due to the cooperation between the second connecting part 32 and the elastic connector 5, offset or compression deformation will occur. After the user leaves the support plate 1, the elastic connector 5 generates a rebound force based on its material properties, causing the second connecting part 32 to move the support plate 1 back to its initial preset posture. This structural configuration allows the support plate 1 to automatically recover its original shape after each use, facilitating repeated use by different users at different times and avoiding the impact of residual deformation on the fit during subsequent uses. Furthermore, the "elastic connector 5" can be a spring, elastic band, rubber support, or a composite connection structure with elastic function, its function being to provide active recovery capability after deformation. The specific orientation and shape of the first support part 11 and the second support part 12 can be flexibly configured according to the overall module design, not limited to a straight line or a specific angle, but the first direction and the second direction are not parallel, thus forming a support base surface with a spatial angle, giving the support plate 1 higher deformation responsiveness. This structure not only improves the rebound function of the module, but also forms a clear support logic in the overall structure of the backrest module, improving the stability and continuity of the user experience.

[0088] For example, combined Figure 4 , Figure 5 The second connecting part 32 can be disposed on the side of the first support part 11 facing the mounting object, or it can be disposed on the side of the second support part 12 facing the mounting object. In this application, the mounting object refers to the base plate 6 or the frame 7 that constitutes the seat back structure, and its material composition can be a composite material with a certain degree of elasticity or a composite material combining rigidity and elasticity.

[0089] It is understandable that if the second connecting part 32 is located on the side of the first support part 11 facing the installation object, a tension spring structure can be adopted. One end of the tension spring is connected to the first support part 11, and the other end is connected to the elastic or rigid area of ​​the installation object. When the user's back applies pressure to the support plate 1, causing the support plate 1 to sink or deform locally, the tension spring will undergo tensile deformation at that position, storing deformation potential energy. When the user's back moves away from the support plate 1, the tension spring will contract under its own elastic recovery ability, thereby driving the support plate 1 to return to its initial position.

[0090] For example, when the second connecting part 32 is located on the side of the second support part 12 facing the installation object, a compression spring structure can be used. One end of the compression spring is connected to the second support part 12, and the other end is connected to the installation object. When the user applies pressure, the compression spring is compressed, storing elastic potential energy; when the user leaves, the compression spring extends due to its own elasticity, driving the support plate 1 to pop outward or spring back to its initial shape. This structural design allows the support plate 1 to return to its initial design shape when not under force, which helps the seat maintain a consistent appearance when not in use, improving the product's visual neatness and functional integrity.

[0091] In some implementations, such as Figure 6 , Figure 7 As shown, the support plate 1 is composed of multiple sub-plates 13, and at least two adjacent sub-plates 13 are connected by a movable connection structure. This movable connection can take various structural forms, such as flexible material connecting strips, hinge structures, ball-and-socket structures, or an integral structure with flexible bending areas. By forming a movable connection between the multiple sub-plates 13, the support plate 1 possesses a certain degree of deformation freedom under external force, enabling it to bend relatively according to the stress conditions of different areas on the user's back.

[0092] It is understandable that the support plate 1 is initially a nearly flat or slightly curved structure. When the user leans against the backrest, based on the difference in contact pressure at different parts of the user's back natural curve, multiple interconnected sub-plates 13 will rotate or flex relative to each other during the force application process, and the overall shape will adapt in coordination with the user's back contour. Because adjacent sub-plates 13 have relative motion capabilities, this structural design makes the support plate 1 no longer a rigid or monolithic deformable unit, but rather a combination of multiple sub-units with independent local deformation capabilities responding to external pressure. This, to a certain extent, improves the fit between the backrest module and the user's back, enhancing the support adaptability and comfort of the support plate 1.

[0093] Furthermore, this structural form offers greater flexibility when applied to different areas of the back. For example, when used to form the left or right backrest module, the movable connecting sub-plates 13 can independently adjust their tilt angles according to the asymmetrical pressure patterns of the user's left and right backs; when used in the neck support area, they can provide more reasonable support by conforming to the natural physiological curvature of the neck. The specific form of the "movable connection" in the above structure needs to be rationally designed in conjunction with the material type, connector structure, and motion restriction method. For example, a limiting structure can be set to limit the maximum rotation angle or maximum flexural displacement between the sub-plates 13 to prevent structural damage or discomfort caused by excessive external force. In addition, "multiple sub-plates 13" can be set to two, three, or more according to actual usage needs. The specific number and arrangement should be designed according to the target support area of ​​the support plate 1 to avoid conflicts with the overall module design space. This structural solution, to a certain extent, helps the support plate 1 maintain good overall support performance while achieving multi-point adaptive deformation.

[0094] In some examples, such as Figure 6 As shown, the support plate 1 consists of two sub-plates 13, namely a first plate 131 and a second plate 132, which are connected to each other by a movable connection structure. This movable connection structure can be in the form of a flexible connector, a hinge structure, or a flexible material transition section, etc., to provide structural conditions for relative bending between the two sub-plates 13. Under the pressure applied to different positions on the user's back, the first plate 131 and the second plate 132 can rotate or bend to a certain extent along the movable connection, thereby changing the overall curvature of the support plate 1 and gradually conforming to the contour shape of the user's back.

[0095] This design, by limiting the support plate 1 to only two functional units, helps to maintain structural simplicity while providing the necessary flexibility and adjustment capabilities. This improves, to some extent, the adaptability of traditional one-piece backrest cushions to different back curves. The relative movement of the first plate 131 and the second plate 132 makes the support plate 1 more prone to localized bending, making it suitable for back areas requiring high precision in localized support, such as the lumbar-back connection 3 or the shoulder-back area. It also facilitates installation and modular assembly, enhancing the flexibility and practicality of the backrest system.

[0096] Furthermore, the first connecting part 31 is located on the first plate 131, and the second connecting part 32 is located on the second plate 132.

[0097] In some implementations, such as Figure 7As shown, the plurality of sub-plates 13 also include a first plate 131, a second plate 132, and a third plate 133, with the first plate 131 and the third plate 133 located on opposite sides of the second plate 132. Specifically, the first plate 131 and the second plate 132 are connected by a movable connection structure, and the third plate 133 and the second plate 132 are also connected by a movable connection structure.

[0098] It is understood that the movable connection structure can be a flexible material hinge connection, a mechanical rotation connection, or an elastic transition component structure. Compared with the two-section structure, this three-section sub-plate arrangement has a higher degree of adjustment freedom when conforming to the contour of the human back, and can adapt to more complex or larger back support needs to a certain extent, especially suitable for application scenarios with a long support area from the shoulders to the waist.

[0099] Meanwhile, the three sub-plates 13 (i.e., the first plate 131, the second plate 132, and the third plate 133) are connected to form a double movable contact structure, allowing the entire support plate 1 to form two relatively curved angle transition areas, thus creating a support shape that better conforms to the curvature of the human back. For example, when external force is applied to the user's back, the pressure on the second plate 132 can cause the first plate 131 and the third plate 133 to rotate or shift in opposite directions, allowing the support plate 1 to simultaneously form different curvature adjustments at multiple positions, thereby improving the contact area and support matching between the support plate 1 and different areas of the human back. In addition, the use of multiple movable connection structures also facilitates the local adjustment, modular manufacturing, and maintenance of the backrest module. During the structural implementation process, different materials or connection methods can be combined for adaptation, thereby expanding the applicability of the support plate 1 and possessing high structural flexibility and ergonomic adaptability.

[0100] In some implementations, such as Figure 7 As shown, at least one first connecting part 31 and / or at least one second connecting part 32 are respectively disposed in the first plate 131, the second plate 132, and the third plate 133 to achieve structural fixation and functional connection between each sub-plate 13 and the support frame or connecting components. The first connecting part 31 and the second connecting part 32 can be connecting components with different functions, such as a rotating connector 4 or an elastic connector 5. Their layout in the overall structure of the support plate 1 should be specifically configured according to the force direction and deformation requirements of the target support area. When the first connecting part 31 is disposed in the first plate 131, it enables the first plate 131 to undergo rotation or elastic deformation under the action of the connector. Similarly, when the second connecting part 32 is disposed in the second plate 132 or the third plate 133, it can also enable the corresponding sub-plate 13 to undergo local offset or elastic adjustment according to the user's weight distribution, thereby providing a more refined support surface adaptation capability for the human back.

[0101] It is understandable that this distribution of the connection structure gives the support plate 1 greater adjustment flexibility. Especially when the user is dynamically lying down or standing up, the sub-plates 13 (i.e., the first plate 131, the second plate 132, and the third plate 133) can generate multi-directional deformation coordination through the connecting parts 3 (i.e., the first connecting part 31 and the second connecting part 32), making the support performance of the support plate 1 more continuous and uniform for different areas of the human back. In addition, the reasonable distribution of different types of connecting parts 3 in different sub-plates 13 is also beneficial to decouple the rotation function and the rebound function, improving the overall stability and service life of the support plate 1 while maintaining the support deformation capacity. Here, the expression "located in" refers to the structural fitting relationship between the connecting part 3 and the sub-plate 13, which can be either structural covering or surface mounting. The specific form can be flexibly selected according to the material and module design of the sub-plate 13.

[0102] For example, combined Figure 8 , Figure 9 The surface of the foam body 2 facing away from the support plate 1 has foam pores 24, which face the user's back. This increases breathability and improves the user's comfort when lying on the foam body 2. Simultaneously, these foam pores 24 can also allow airflow into the backrest foam body 2 after a ventilation structure is installed, allowing the user to feel a cool breeze while lying on the support plate 1. Furthermore, multiple foam pores 24 are arranged along the spine of the user's back, which increases the breathable area on the user's back, significantly improving comfort.

[0103] For example, combined Figure 1 , Figure 8 and Figure 9 The surface of the backrest foam body 2 is provided with an installation groove 25, which can be used to install foam air bags to improve the user's comfort when lying on the support plate 1. Furthermore, the inner wall of the installation groove 25 has multiple protrusions 251 and recesses 252 circumferentially. The multiple protrusions 251 and recesses 252 are connected in an alternating manner. The arrangement of the protrusions 251 and recesses 252 makes the installation groove 25 not a conventional shape. This causes the foam air bag to be forced to deform under the constraint of the installation groove 25 after it is installed in the installation groove 25, resulting in a higher fit between the installation groove 25 and the foam air bag, and thus better installation stability of the foam air bag in the installation groove 25.

[0104] Secondly, referring to Figures 1 to 9 This application also provides a seat back, including a backrest module of the first aspect, and further including a base plate 6 and a frame 7, wherein the base plate 6 is disposed on the frame 7, and the backrest module is disposed on at least one of the base plate 6 or the frame 7.

[0105] Thirdly, this application also provides an automobile seat, including a seat backrest as described in the second aspect.

[0106] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0107] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0108] The embodiments, implementation methods, and related technical features of this application can be combined and substituted for each other without conflict.

[0109] The above are merely preferred embodiments of this application and are not intended to limit this application in any way. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of this application without departing from the scope of the technical solution of this application shall still fall within the scope of the technical solution of this application.

Claims

1. A backrest module, characterized in that, The backrest module is used to form support for a portion of the seat backrest, and the backrest module includes: Support plate (1); Foam body (2), said foam body (2) is mounted on one side of the support plate (1); wherein, The support plate (1) has at least one connecting part (3) on the side opposite to the foam body (2), and at least one connecting part (3) is used to fix the movable connector.

2. The backrest module according to claim 1, characterized in that, At least one of the connecting parts (3) includes a first connecting part (31) and a second connecting part (32), the first connecting part (31) being configured to fix a rotating connecting member (4), and the second connecting part (32) being configured to fix a resilient connecting member (5).

3. The backrest module according to claim 2, characterized in that, The support plate (1) includes a first support part (11) and a second support part (12); The first support portion (11) extends along a first direction, and the second support portion (12) extends along a second direction, wherein the first direction and the second direction are not parallel.

4. The backrest module according to claim 3, characterized in that, The foam body (2) includes a first foam part (21) and a second foam part (22), the first foam part (21) is disposed on the first support part (11), and the second foam part (22) is disposed on the second support part (12).

5. The backrest module according to claim 4, characterized in that, A groove (23) is provided at the junction of the first foam part (21) and the second foam part (22). The thickness of the foam body (2) corresponding to the groove (23) is less than the thickness of either the first foam part (21) or the second foam part (22).

6. The backrest module according to claim 5, characterized in that, The groove (23) is located on the side of the foam (2) away from the support plate (1).

7. The backrest module according to claim 6, characterized in that, The length direction of the groove (23) is parallel to the boundary line between the first foam part (21) and the second foam part (22).

8. The backrest module according to claim 3, characterized in that, The first connecting part (31) is located at the junction of the first support part (11) and the second support part (12).

9. The backrest module according to claim 8, characterized in that, The second connecting part (32) is located on the side of the first support part (11) facing the object to be installed; or, the second connecting part (32) is located on the side of the second support part (12) facing the object to be installed.

10. The backrest module according to claim 3, characterized in that, The support plate (1) includes multiple sub-plate bodies (13); At least two adjacent subplate bodies (13) are movably connected.

11. The backrest module according to claim 10, characterized in that, The plurality of sub-plates (13) include a first plate (131) and a second plate (132), wherein the first plate (131) and the second plate (132) are movably connected.

12. The backrest module according to claim 11, characterized in that, The first connecting part (31) is located on the first plate (131), and the second connecting part (32) is located on the second plate (132).

13. The backrest module according to claim 10, characterized in that, The multiple sub-plates (13) also include a first plate (131), a second plate (132), and a third plate (133); The first plate (131) and the third plate (133) are located on both sides of the second plate (132); The first plate (131) is movably connected to the second plate (132), and the third plate (133) is movably connected to the second plate (132).

14. The backrest module according to claim 13, characterized in that, At least one of the first connecting portions (31) and / or at least one of the second connecting portions (32) are located on the first plate (131); At least one of the first connecting portions (31) and / or at least one of the second connecting portions (32) are located on the second plate (132); At least one of the first connecting portions (31) and / or at least one of the second connecting portions (32) are connected to the third plate (133).

15. The backrest module according to any one of claims 1 to 14, characterized in that, The surface of the foam body (2) facing away from the support plate (1) is provided with foam pores (24).

16. The backrest module according to claim 15, characterized in that, The foam pores (24) are arranged in multiple ways along the spine of the user's back.

17. The backrest module according to claim 15, characterized in that, The foam body (2) has at least one mounting groove (25) on its surface away from the support plate (1), the mounting groove (25) being configured to hold an air bag.

18. The backrest module according to claim 17, characterized in that, The inner wall of the mounting groove (25) has a plurality of protrusions (251) and recesses (252) in the circumferential direction, and the plurality of protrusions (251) and recesses (252) are connected in an alternating manner.

19. A seat back, characterized in that, The backrest module according to any one of claims 1 to 18 further includes a base plate (6) and a frame (7), the base plate (6) being disposed on the frame (7), and the backrest module being disposed on at least one of the base plate (6) or the frame (7).

20. A car seat, characterized in that, Including a seat back as described in claim 19.

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